Screen refreshing method and computer readable storage medium

Abstract

The invention discloses a screen refreshing method and a computer readable storage medium. The screen refreshing method comprises the following steps that a display engine reads display data from a DRAM, converts the display data into a time sequence control signal and parallel data, and outputs the time sequence control signal and the parallel data; a QSPI interface receives the time sequence control signal and the parallel data and then converts the time sequence control signal and the parallel data into a screen display signal to be output; and after receiving the screen display signal, display equipment feeds back a synchronous signal TE to the display engine to trigger a screen refreshing action. According to the screen refreshing method, the whole screen refreshing process is achieved through hardware, a large number of CPU resources do not need to be occupied, and the problem of frame loss caused by waiting for CPU response is avoided; by means of the TE synchronizing signal fed back by the display equipment, a TE signal is fed back when the display equipment requests to send screen refreshing data, the display engine is triggered to start screen refreshing, screen refreshing at a fixed time sequence is achieved, and the phenomenon of picture tearing can be solved.

Description

technical field [0001] The present invention relates to the technical field of screen display, in particular to a screen swiping method and a computer-readable storage medium. Background technique [0002] The traditional way of refreshing the screen is to refresh the screen through 4 SPI (Serial Peripheral Interface, Serial Peripheral Interface) data lines. This method uses the SPI interface to use CPU instructions to operate the screen refreshing process, which has the following shortcomings: [0003] (1) When the CPU is needed to trigger the screen refresh action, there may be insufficient system resource allocation, and it is too late to respond, resulting in frame loss; [0004] (2) The screen refresh is triggered by the CPU, the timing is not completely fixed, and the interval between frames is offset, which will lead to unsmooth phenomena in dynamic images, especially video playback; [0005] (3) For the display screen with buffer (buffer), there will be screen teari...

AI Technical Summary

Problems solved by technology

[0003] (1) When the CPU is needed to trigger the screen refresh action, there may be insufficient system resource allocation, and it is too late to respond, resulting in frame loss;

[0004] (2) The screen refresh is triggered by the CPU, the timing is not completely fixed, and the interval between frames is offset, which will lead to unsmooth phenomena in dynamic images, especially video playback;

[0005] (3) For the display screen with buffer (buffer), there will be screen tearing phenomenon due to the non-synchronous mechanism of buffer writing and reading

Images